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Cycles In Ecosystems
Test Description: Cycles in Ecosystems
Instructions: Answer all questions to get your test result.
1) I fall on Earth’s surface as rain, snow, sleet, or hail. What am I?
A
evaporation
B
precipitation
C
runoff
D
groundwater
2) I am the changing of a liquid into a gas. What am I?
A
condensation
B
compost
C
groundwater
D
evaporation
3) I am a mixture of decayed plant and animal material that can be used as fertilizer. What am I?
A
compost
B
runoff
C
nitrogen cycle
D
groundwater
4) I am the continuous changing of nitrogen gas into compounds in the soil and its later release back to the air. What am I?
A
nitrogen cycle
B
precipitation
C
carbon cycle
D
compost
5) I am water that sinks beneath the ground and collects in tiny holes in soil and rock. What am I?
A
runoff
B
precipitation
C
condensation
D
groundwater
6) I am the continuous exchange of carbon among living things. What am I?
A
compost
B
carbon cycle
C
evaporation
D
nitrogen cycle
7) I am precipitation that flows over the land’s surface into rivers and lakes and is not absorbed into the ground. What am I?
A
evaporation
B
runoff
C
groundwater
D
condensation
8) I am the changing of a gas into a liquid as the gas cools. What am I?
A
runoff
B
condensation
C
precipitation
D
evaporation
9) Plants use nitrogen in the form of __________________.
A
fixation
B
decomposers
C
nitrates
D
atmosphere
10) Organisms called ___________________ release carbon dioxide when they break down dead organisms.
A
precipitation
B
nitrates
C
decomposers
D
runoff
11) Water condenses in the atmosphere and falls, as _____________ into oceans and the ground, or over land as ____________.
A
precipitation
B
fixation
C
runoff
D
evaporation
12) Nitrogen ____________________ places nitrogen in a form in which it can be used by most living organisms.
A
runoff
B
nitrates
C
fixation
D
decomposers
13) Carbon dioxide is released back into the _________________ when living things use it as food.
A
evaporation
B
precipitation
C
atmosphere
D
runoff
14) Heat causes water to rise from Earth’s surface as a gas through a process called _______________________.
A
fixation
B
evaporation
C
runoff
D
condensation
*select an answer for all questions
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